Faction destroyed bug
I suspect this is a known bug, but I didn't see a post, so here I go.
Did a 3 player FFA with two AI today and saw that one of my opponents destroyed the other faction. Only problem is they still had ships, planets, and well, generally were alive. I THINK it's due to Novalith cannons destroying a planet population, and a free colony ship (which is still AI controlled) colonizing another planet, but not 100% sure, as it took me a bit to get my fleet over there to look. All I'm certain of is that by the time I finally took my fleet in, the destroyed faction had about four planets, which seems a bit high for just one colony ship.
While destroyed, any diplomatic interactions with the player was impossible, all that jazz.